Recorder



Feb. 17, 1948. A. H. REIBER 2,436,229

RECORDER Filed July 29, 1945 '7 Sheets-Sheet 1 INVENTOR ALBERT H. REIBER, DECEASED EMILY Y. RE\BER, EXECUTRIX Feb. 17, 1948. A. H. REIBQER RECORDER Filed July 29, 1943 '7 Sheets-Sheet 2 9 INVENTR n ALBERT H. REIBER,DECEASED :gmmwmn EMILY Y. REIBER,EXECUTRIX Feb. 17, 1948. A. H. REIBER 2,436,229

RECORDER I Filed Juli 29, 1945 7 Sheets-Shet 5 INVENTOR ALBERT H. REIBER, DECEASED EMILY 'Y. REIBER, EXECUTRIX ATTORNEY Feb. 17, 1948.

A. H. REIBER RECORDER Filed July 29, 1943 7 Sheets-Sheet 4 INVENTOR ALBERT H. RElBER,oEc .=.-Asso EMILY Y. REIBER, EXECUTRIX BU E ATTO EY Feb. 17, 1948. RElBER 2,436,229

RECORDER Filed July 29, 1945 7 Sheets-Sheet 5 llllllll a Mm llllllllllllll 'IIIIIIIII INVENTOR ALBERT H. REIBER, DECEASED EMILY Y. REIBER, EXECUTRIX Feb. 17, 1948. A. H. REIBER 2,436,229

RECORDER Filed July 29, 1943 7 Sheets-Sheet 6 262 Jul a 29 258 FIG. 2| 26' I W 1 25s 2 FIG. 22 r EMlLY Y REIBER, EXECUTRIX .ATToRnv Feb. 17, 1948.

A. H. REIBER 2,436,229

RECORDER INVENTOR ALBERT H. REIBER, DECEASED EMILY v. REIBER, EXECUTRIX RECORDER Albert R. Iteiber, deceased, late of EvanstonJlL, by Emily Y. Reiber, executrix, Evanston, Ill., assignor to Teletype Corporation, Chicago, 111., a corporation of Delaware Application July 29, 1943, Serial No. 496,551

12 Claims.

This invention relates to recording apparatus and more particularly to combination printing and perforating apparatus for the substantially simultaneous preparation of a printed record and a perforated record. This device is an initiating recorder by printing-and-punching, using a textualerror correcting means for both records, the whole device being at a sending station, However, the printing-an'd-punching means only can be used in a receiver at a remote station, some transmitting set of contacts being used at the sending station.

The principal object of the invention is the provision of means for eflecting corresponding correction of the textual errors in the records made on a plurality of different recording mediums.

Another object of the invention is to provide devices in a combination printing and perforating apparatus for enhancing the effectiveness 1, 1941, to A. H. Reiber as modified by Reiber 2,296,874. The device according to the present invention has many parts similar to the parts.

in said patents, but the instant device is at the sending station and is operated by its own keyboard which by means of a short cable controls the sending of code impulses to its selector ma net. Said patents disclose a page printer, but the apparatus according to the present invention contemplates the addition thereto of a tape perforating device which is connected to and controlled by the selector mechanism of said page printer, so that substantially simultaneous records are made on the page material and on the tape. In such combination printing and perforating devices, it is desirable to provide means for correcting the page record and the tape perforated record substantially simultaneously, the latter a little before the former. In performing this operation the tape record is back spaced and after back spacing a sufficient number of characters representing the to-be-corrected material, the tape is again forward spaced, and the back spaced characters are then cancelled by perforating thereover a rubout signal. To make the record on the page agree with the perforated record, the present invention provides means for substantially simultaneously back spacing the printed record in correspondence with the back spacing operation of the perforated tape. Then,

when this operation is performed, the record on the page corresponding to the deleted record on the tape is cancelled by printing thereover a can-- cellation character.

Another feature of the present invention consists in providing means, effective under certain predetermined conditions, to suppress the back spacing of the printed copy when the tape is be- ,ing back spaced, for the reason that when thewhen the tape is in its back spaced position, and

of locking mechanism to lock the key levers against operation while the tape is beingback spaced, said locking mechanism remaining effective until all the back spaced characters have been rubbed out.

A more complete understanding of the present invention may be had from the following description when taken in conjunction with th accompanying drawings wherein like reference numerals are used to designate similar parts throughout and wherein:

Fig. 1 is a front elevational view of the printer shown in the above-mentioned Reiber patent. modified according to the present invention;

Fig. 2 is a partial sectional plan view of the printer shown in Fig. 1 disclosing the present invention;

Fig. 3 is a partial sectional view of the punch block to show operation of the pawls of the back spacing mechanism for the punched tape;

Fig. 4 is a view showing one ofthe eflective positions of the selector members;

Fig. 5 is a view showing a second effective po sition of the selector members;

Fig. 6 is a front elevational view of the back space indicator and key board lock actuating mechanism of the present invention;

Fig. '7 is a plan view of the mechanism shown in Fig. 6;

' Fig. 8 is a side elevational view, partly in section, of the mechanism shown in Figs. 6 and 7;

Fig. 9 is a fragmentary perspective view of mechanism to suppress the back spacing operation when the platen is in its beginning-of-line position;

Fig. 10 is a sectional view taken on line 10-10 of Fig. 6;

Fig. 11 is a sectional plan view of a modificaessence tion of the perforating device whereby the back spacing of the platen of the page printer is suppressed under certain operating conditions:

Fig. 12 is a side elevational view of the modification shown in Fig. 11;

Fig. 13 is a front elevational view of the modification shown in Fig. 11;

Fig. 14 is a perspective view of the sixth punch and sensing pin employed in the modification shown in Fig. 11;

Fig. 15 is a sectional plan view of another modification of the invention for suppressing the back spacing of the platen while the tape is back spaced;

Fig. 16 is a side elevational view of the modification shown in Fig. 15;

Fig. 1'! is a front elevational view of the modification shown in Fig, 15;

Fig. 18 is a sectional plan view of the modification shown in Fig. 15, illustrating the sensing mechanism in one of its operating positions;

Fig. 19 is a sectional plan view of the modification shown in Fig. 15, showing a second operating position of the sensing mechanism:

Fig. 20 is a fragmentary plan view of a further modification of the invention for suppressing the back spacing of the platen when the tape is back spaced;

Fig. 21 is a side elevational view of the modification shown in Fig. 20;

Fig. 22 is a front elevational view of the modification shown in Fig, 20;

Fig. 23 is a sectional plan view of the modification shown in Fig. 20 illustrating the sensing mechanism in one of its operated positions;

Fig. 24 is a fragmentary side elevational view of the apparatus according to the present invention showing a keyboard locking device controlled by the back spacing mechanism;

Fig. 25 is a sectional view taken on line 25-25 of Fig. 24;

Fig. 26 is a front elevational view of the punch block showing an arrangement for marking the tape during the back spacing operation;

Fig. 2'? is a sectional view taken substantially on line 21-21 of Fig. 26;

Fig. 28 is a sectional plan view of the plmch block showing as another modification a luminous indicator associated therewith, and

Fig. 29 is a front elevatlonal view of the device shown in Fig. 28.

Having reference to Fig. 1 of the drawings, the numerals H and I2 denote generally the typing unit and the keyboard transmitting unit, respectively, of the printing telegraph apparatus shown in the store-mentioned Patent No. 2,247,408. The keyboard apparatus comprises a base portion 13 on which is mounted the transmitting contact assembly l4, which comprises a plurality of transmitting contact springs i controlled by a corresponding plurality of gooseneck levers l3 pivoted at H which are controlled sequentially by a series of cams, as disclosed in Relber Patent No. 2,296,874. Contacts i5 are electrically connected by cable ill to selector magnet 35.

The typing or printing unit H comprises a platen l8 which is moved in a rightward and 2, the printing mechanism ll comprises three vertical shafts 2|. 22, and 23, which are suitably journaled in the printing apparatus. Shaft 2| supports a code disc selector mechanism 24 for determining the printing position of the typ wheel, the function controlling abutment pins 23, as well as the type wheel is. The shaft 22 carries various cams among which are the printing cam and the spacing cam.

Just above the point at which shaft 22 enters the lower bearing block 26, said shaft has secured thereto a gear 21. An electric motor (not shown) drives a pinion which meshes with gear 21 so that the shaft 22 to which the gear 21 is secured, is continuously rotated, It may be added at this point that a gear 23 (Fig. 1) carried by a stub shaft meshes with gear 21, and that a spiral gear 29 also secured to the stub shaft meshes with a gear 3| carried by the transmitter shaft 32. Thus rotation is imparted to the transmitting distributor shaft 32 from the motor pinion through gears 21, 23, 29, and 3|.

The sword and T-lever mechanism indicated generally as 33 is actuated under the joint control of selector cam assembly 34 and the selector magnet 35 (Fig. 1) to interpret or integrate a series of impulses representing a signal combination preparatory to setting T-levers 38 in accordance with the signal combination. Each of the T-levers 33 engages one arm of a transfer bell crank 31, individual thereto, the other arm of which is articulated to one of the notched code discs of the code disc selector mechanism 24.

The code disc selector mechanism 24 has a circular arrangement of vertically positioned stop pins 38 which project through slots in the topmost plate of the mechanism. Stop pins 38 are biased inwardly radially of the code disc selector mechanism and near their upper ends they rest against the edges of the shiftable notched code discs as is fully described in the Reiber Patent No. 2,296,874. The notching of the code discs is such that for any permutative setting of the discs under the control of T-levers 36 one only of the stop pins 38 finds presented to it an alignment of notches, whereupon the pin 38 enters the alignment of notches under the influence of its biasing spring, its upper end moving inwardly. A type wheel stop arm (not shown) fixed to the type wheel shaft 2| is of such length that in re volving it just clears those of the stop pins 38 that are held in their outermost positions by the code discs, but finds blocking its path any pin 38 which has entered an alignment of notches in the periphery of the code discs. The type wheel shaft 2| extends downwardly through the code disc selector mechanism 24 coaxially thereof and receives a continuous torque from the driving motor through any convenient means, such as a gear carried by the shaft 2| and connected thereto by friction discs, the gear being continuously in mesh with the motor pinion. With this arrangement, the shaft 2i is always prepared to rotate and is free to do so when any stop pin 38 which has been previously selected is moved out of the path of the stop arm upon the resetting of the code discs. With this arrangement, shaft 2| may be arrested in any angular position in which the stop arm encounters a stop pin 38.

The front portion 39 (Fig. 1) of the primary foundation casting of the typing unit I I has secured thereto spaced brackets 4| and 42. The shaft 23 is rotatably supported in vertical position between brackets 4| and 42. Shaft 23 has securedihereto near the lower end a gear 43 ported by gear 21 as secured thereto by any desired means, such as screws. Gear 43 is cooperatively related with a positive engagement clutch mechanism. indicated generally as 45 (Fig. 1), which governs the rotation of a cam sleeve 48.

The cam sleeve 46 supports the transfer cam 48, the type wheel shift cam 41 and a double grooved face cam 49 which controls the operation of the perforating mechanism. The direction of rotation of cam sleeve 46 is counterclockwise, and

v cam 48, in being rotated, imparts clockwise rotation-to the cam follower lever 5i and its locking extension 52. The follower lever 5| is mounted on a pivot shaft 53 suitably carried in the printer structure.

Mounted on shaft 22 is a channel or box cam 54, the cam groove 55 of which receives the follower roller 56 rotatably mounted on a bell crank lever 51 rockably mounted on the pivot shaft 58. A lever 59 is also rockably mounted upon the shaft 58 and is secured at its forward end to the cam operated bell crank lever 51 by a clamping bolt 6i which passes through a slot (not shown) in the bell crank lever 57. Said slot provides adjustabllity in the clamping together of the levers .59 and 51. The lever 59 is effective in the conditioning of functions when they are selected. As described in U. S. Patent No. 2296874 the selection of functions is controlled in accordance with certain stop positions of the type wheel, and the lever 59 is provided for effecting response of the functioning conditioning or performing mechanisms. Such means has been provided on the type wheel shaft 2i and comprises a plurality of index pins or abutment pins 25 disclosed in various horizontal planes and in various radial positions with respect to the type wheel. For cooperation with the index pins 25 there are provided a plurality of superposed levers 63 pivotally mounted on a pivot pin 64' carried at the rearmost end of lever 59. s

A spacing pawl 84 is articulated to the pin 65 carried in the end of a bell crank lever 68 through a spring yield connection comprising slot 66, spring 67 and a guide pin 68. The pivot pin 65 enters the slot 66 and is urged to the forward end of the slot by the compression spring 61. The pin 65 is retained in the slot inside the convolutions of the spring 6'! and prevents the spring from escaping from the slot. The normal movement of the pawl 64 is reciprocatory due to the rocking of the bell crank lever 68 about a cam (not shown), but if the movement of the pawl 84 is blocked as it may be under certain circumstances, the pin 65 may move within the slot and the spring 61 will take up the movement imparted by the cam and will restore the pin 65 to the forward end of the slot 66 when the follower roller 56 has escaped from the highest portion of cam 54. The pawl 64 has at its opposite end a ratchet engaging prong 69 which engages a spacing ratchet H to impart counterclockwise rotation thereto as the pawl 84 is reciprocated. The pawl 64 is spring biased into contact with the ratchet I I by a spring 18. The ratchet wheel II is fixed to a rotatable carriage spacing shaft 12 which carries at its upper end a pinion (not shown) which meshes with a rack connected to the platen carriage I8. A 'step-by-step movement of the carriage I8 for letter spacing is effected by counterclockwise rotation of the spacing ratchet II responding to the reciprocation of the spacing pawl 64. Now, as the carriage I8 is stepped for letter spacing, it tensions the carriage return spring for a carriage return operation. A retaining pawl 16 pivotally mounted at 16 and urged ina counterclockwise direction by a spring 'l'i engages one after another of the teeth of the ratchet II and retains the'ratchet and thus the platen carriagein the successive positions to which they are advanced by the pawl 84.

According to the present invention the T- levers 86 of the selector mechanism 88 are arranged to control also the selective operation of a perforating mechanism provided for the purpose of producing a perforated record on a tape corresponding to the printed record made on the page. To achieve this result a perforating device is provided at the forward upper right-hand portion of the typing unit II, as indicated in Fig. 1. This perforating device is indicated generally by the numeric 8B.

The locking extension 52 cooperates with a plurality of levers 82 pivoted on 88 to control the selective positionment of a corresponding plurality of interponents 84, each interponent 84 being pivotally articulated to the lever 82. As the cam follower 5I is rotated clockwise by its cam 48, its locking extension 52 acts upon projections 85 individual to levers 82 to rotate the levers 82 counterclockwise a predetermined angular amount sufficient to bring the shoulder 86 of the levers 82 out of the arcuate path of the extremities 81 of the T-levers 36, so that when the T- levers 36 are rocked counterclockwise during the selective positionment thereof, the extremity 8! is rotated into the path of the shoulder 86. When the locking extension 52 is again rocked or rotated counterclockwise to the position shown-in Fig. 2, the shoulders 86 of certain ones of the levers 82 will be blocked by the extremities 81 of certain levers 36, and thus levers 82 are prevented from rotating in a clockwise direction under the influence of individual springs 88, while others of the levers 82 which are not blocked by the T- levers 36 will be rotated back to their clockwise position by their springs 88, as'indicated in Fig. 2. As indicated in Figs. 2, 4, and 5, various selective positions of the levers 82 and interponents 84 are illustrated.

The perforator 8I comprises a set of punches 89 movable through a guide plate 9| and meeting with a die plate 92 to perforate a tape 93. The interponents 84 are provided with projections 94, so that when an interponent 84 is selected and moved rightwardly, as viewed in Fig. 2, the projection 94 will align with the punch 89 to cause it to perforate the tape when the punch hammer 95 is rocked about the pivot 96. The punch hammer 85 is provided with an arm 91 which is pivotally articulated to one arm of a punch operating lever 98, the other arm of which is provided with a cam follower roller which cooperates with a cam groove in cam 49. Lever 98 is pivotally mounted on a pivot shaft 99 to which is also pivotally carried a lever H. To the end of one arm of lever I M is mounted a follower roller which cooperates with a cam groove in the box cam 49, and at the other end of the other arm of lever IN is pivotally mounted a pawl member I82 which is normally biased counterclockwise by a spring I83 into cooperative engagement with a tape feed ratchet I84 (Fig. 3). For each cycle of rotation of cam 49, the levers 98 and IM are rocked through a single reciprocatory movement to effect corresponding movements of the punch hammer 95 and pawl I82, respectively. The hammer 95 is provided with a portion I85 which guides the extremities punching operation, the pawl I02 is moved forwardly (as viewed in Fig. 2) to engage a tooth on the ratchet I04 and when the punch hammer and pawl are moved in the opposite direction the pawl I02 will engage the ratchet tooth and rotate the ratchet I04 one angular step correx5 spending to a character spacing movement of the tape.

The ratchet I04 is integrally associated with the feed roll shaft I06 which carries thereon (as viewed in Fig. l) a peripheral series of feed pins I01. Carried on the feed roll shaft I06 is a detent star wheel I08 with which is associated a detent jockey I09.

The present invention also provides an arrangement for back spacing the tape 93 which is at the same time effective to impart reverse movement to the platen I8 corresponding to the back spacing movement of the tape. Carried in the punch block III is a back space bar II2 having at its forward end a finger piece I I3. The

bar I I2 is also supported behind the punch block in a bearing H4. The bar I I2 is shouldered at H5 and a spring H6 is compressed between the bearing H4 and shoulder H5 to hold the bar H2 normally in its forward position. A plate H1 is rotatably mounted on the feed roll shaft I06 and is arranged to be pivotally articulated at I20 to the back space bar II2. With this manner of connection, the plate H1 is rotated counterclockwise, as viewed in Fig. 3, when the 49 back space bar H2 is actuated rearwardly upon pressing the finger piece H3 and when the bar H2 is urged forwardly by the spring II6 upon release of the finger on the finger piece H3, the

plate I I? will be rotated clockwise to the position shown in the Fig. 2.

The'plate II1 carries a pawl member H8 pivoted at H9 (Fig, 3). Few] H8 is provided with an arm I2I which is caused to bear against the side of space bar II2 by the action of a spring I22 which continually tends to cause pawl II8 to rotate in a counterclockwise direction about pivot I I9. However, in the position shown in Fig, 3, the spring I22, in tending to rotate the pawl II 8 so as to cause the end I2I thereof to bear against the side of the bar II 2, is prevented thereby from bringing the tooth of the pawl IIB into engagement with the teeth of the back space ratchet I23. Now, when the space bar H2 is actuated rearwardly, the pivot I20 is correspondingly actuated rearwardly so as to rotate the plate H1 in a counterclockwise direction. In so doing, the pivot I I9 is also moved counterclockwise with the plate II1 away from bar II2 so that the spring I 22 is enabled to rotate the pawl II8 counterclockwise to bring the tooth of the pawl II8 into engagement with the teeth oi the ratchet wheel I23. This is made possible by the fact that the pivot H9 is moved farther away from the side of the bar II2 so as to per- 7 mit the pawl III! to be rotated since the arm I2I is held constantly in engagement with the side of the bar II2 as the pivot H9 is moved with the plate I". Then, as the bar I I2 is urged farther in the rearward direction, the pawl H8 7| 8 will rotate the ratchet I23 counterclockwise, thus causing the feed roll I06 to rotate correspondingly to move the tape in a reverse direction (or rightwardly. as shown in Fig. 2). However, to enable the performance of the back space operation, it is necessary to hold the feed pawl I02 out of engagement with the main feed ratchet I04, This is achieved by means of the arcuate member I24 adjustably carried on the plate II 1. Member I24 is provided with a depending portion I25 which is adapted to engage the pawl I02 as the plate I" is rotated counterclockwise and in this manner disengages the pawl I02 from the ratchet I04 just prior to the engagement of pawl II8 with ratchet -I23.

It is a feature of the present invention to cause the platen I8 to be back spaced in accordance with the back spacing operations applied to tape 93. To accomplish this result, the back spacing bar H2 is extended rearwardly and is pivotally connected to one arm of a bell crank lever I26, pivotally mounted at I21 on a bracket I28 secured to the printer frame. Lever I26 is provided with an arm I29 s0 conformed as to form a pivotal connection for one end of a link I3I. The other end of link I3] is pivotally connected to arm I32 of a member I33 pivoted at I34 in a position properly located with respect to the ratchet wheel II. Lever I33 is of a U-shaped conformation so as to provide a rigid bearing on the pivot shaft I 34 and is provided with a secand arm I35 having an open-ended slot which cooperates with a pin or stud I36 fixed to pawl lever E31. Lever I31 is provided with a long arm I38. the end of which cooperates with a pin I39 on the spacing lever 64. The pawl lever I31 is also provided with a projection I4I which coacts with a projection I42 on the detent pawl 15.

The spring II6 which tends to hold the bar H2 in a forward position with a shoulder I 43 against the portion N4 of the frame also tends to hold the lever I26, link I3I and lever I33 in the position shown in Fig. 2 with the tooth I44 of pawl I31 disengaged from the ratchet II. Then, when the back space bar H2 is actuated rearwardly by depressing the finger piece H3 the bell crank lever I 26 will be actuated counterclockwise to move the link I3I rightwardly, which thereby imparts counterclockwise rotation to lever I33. This movement of lever I33 is transferred through the pin I36 to the pawl lever I31, thus bringing the tooth I44 of the pawl lever I31 against the ratchet 1i. Substantially simultaneously with this action, the projection I4I acts upon the projection I42 to rotate the detent pawl 15 clockwise against the action of spring 11 to disengage the tooth thereof from the tooth of the ratchet II with which it is engaged. With this action also the arm I38 of the pawl lever I31 acts upon the pin I39 to move the prong 69 of the spacing lever 64 out of operative engagement with ratchet II to permit backward (or clockwise) rotation of the ratchet wheel II.

Due to the action of the carriage return spring 13 which tends to rotate the ratchet wheel II in a clockwise direction as shown in Fig. 2, the

' ratchet wheel 'II is rotated only slightly or until the oncoming tooth I46 engages the pawl tooth I44. Then, when the finger piece H3 is released and the bar 2 is actuated forwardly by the spring I I6, the bell crank I26 is rotated clockwise to move the link I3! leftwardly to impart clockwise rotation to the lever I33. This movement of lever I33 is then transferred through pin I38 to the pawl lever I31 to withdraw the tooth I44 from engagement with the ratchet tooth I40. Concurrently, the projection I4I permits through the projection I42, the detent pawl to rotate counterclockwise by the action of spring II to bring the tooth of the detent pawl 16 into the path of the next tooth on the ratchet II so that as the tooth I44 is withdrawn from engagement with tooth I48 the pawl 15 acts to stop the motion of the ratchet wheel H in a clockwise direction when the oncoming tooth thereof engages the pawl 15. Through the instrumentality oi. the mechanism just described, the platen carriage I8 can be back spaced in correspondence with the back spacing of the tape, since the movement of the ratchet II is transferred through shaft 12 to the rack and pinion interconnection between the shaft 12 and the platen carriage l8.

The present invention contemplates the provision of mechanism for locking the keyboard,

except the Rub out key 20 (punching) and the Character black-out key (printing), against operation when the back spacing operation is being performed, which lock remains effective until all the back spaced code combinations have been rubbed out, or cancelled, by perforating thereover the all-marking or rubout signal. This arrangement is shown in Figs. 6, 7, 8, and 10 wherein the punch block BI is the same as shown in Fig. 1.

a detent wheel, as indicated in Fig. 2. For the purposes of the present invention, the star wheel I08 is employed to actuate a rack bar 302 which is slidably carried in a guide member 303 which is provided with a cover plate 304. The guide member 303 and plate 304 for slidably guiding the rack bar 302 are supported on the frame member 4| by means of a bracket 305. The guide member 303 and plate 304 are further supported at their right-hand end, as viewed in Figs. 6 and 7, by a support bracket 306 which is attached to the punch block 8|.

When .the rack bar 302 is in its left-hand position the teeth thereon normally bear against the teeth of the star wheel I08 through the instrumentality of the spring biased member 301 which is slidably mounted in the guide member 308 attached to the under side of the member 303. Member 301 is provided with a spring post, to which one end of a spring 309 is attached, the other end being attached to a spring post located on the plate 303. With this construction the member 30'! tends to urge the bar 302 against the teeth on the periphery of the star wheel I08, so that once the star wheel I08 is rotated in a counterclockwise direction, during the back spacing operation under the control of the back spacing bar H2, the spring 309 will move the member 30'! to cause rack bar 302 to follow in a rightward direction (as viewed in Ft'g. '7) to insure the engagement or meshing of the various teeth. In response to each operation of the back spacing member I I2 the rack bar 302 will be advanced one step to the right. After the rack bar 302 has been advanced the full distance toward the right commensurate with the number of teeth on the rack bar, the bracket 3l2, which is supported by a guide 3 I 3 secured to the bottom side of the member 303 and which engages a groove 3l4 on the bottom side of the rack bar 302 (as shown in Fig. 10), will be engaged by the end wall 3I5 of the groove 314 which will tend to urge the bracket 3|2 rightwardly against the action of its spring3l6. through the instrumentality of the bracket 3i 2 Fixed t0 the. feed roll shaft I06 is the star wheel I08 which normally functions as will tend to hold the rack bar teeth in engagement (in a leftward direction) against the teeth of the star wheel I08 to insure proper meshing or engagement during the forward (leftward, as viewed in Fig. 7) spacing movement of the tape.

Carried on the cover 304 of the rack guide is a bracket 3" on which is pivotally mounted, at 318, an indicator dial 3I9 which cooperates with an aperture MI in the cover 322 of the printing apparatus. The indicator dial 3|9 is also provided with an extension 323 which cooperates with the right-hand end of the rack bar 302.

When the-rack bar 302 is actuated rightwardly, it will upon the first character space in its movement, cause the indicator dial M9 to be rotated in a counterclockwise direction to bring the legend thereon, namely, Rubout." into view through the opening or aperture 32! in the cover 322. So long as the rack bar 302 is actuated rightwardly the extension 323 will continue to ride upon the upper surface of said rack bar to hold the indicator dial 3 I 9 in its counterclockwise position with the legend showing through the aperture 32 I. On

In this manner the spring 8";

the other hand, when the rack bar 302 is actuated or returned leftwardly during the normal letter spacing or tape feeding movement. the indication Rubout will appear through the aperture 32l until the bar 302 has reached its farthest lefthand position, whereupon the indicator dial 319 will be rotated to its clockwise position I shown in Fig. 6) due to the extension 323 riding oil of the top surface of the rack bar 302. The purpose-0f this indication is to apprise the operatorbf the fact that so long as the word Rubout appears 'throughthe aperture 32I there are further code combinations to be cancelled or rubbed out. The indicator dial 3l9 is normal y biased in a clockwise direction, as viewed in Fig. 6, through the instrumentaiity of a. torsion spring 320 (indicated more clearly in Fig. 6).

In connection with the feature of locking the keyboard against operation while the back spacing mechanism is operated and as long as the Rubout or cancellation operation proceeds, there is fixed to the feed roll shaft I06 a flanged sleeve member 324. There is freely mounted on the feed roll shaft I06 adjacent the flanged disc 324 a keyboard locking cam 325 which is recessed to embrace a disc of friction material 326 between the cam member 325 and the flanged disc 324. A spring 321 encompassing the feed roll shaft I06 is compressed between the bracket 328 and the cam 325 to exert pressure upon the cam 325 and the disc 324 to render the friction clutch efiective.

The cam 325 is provided with a notch 329 which cooperates with a cam follower 33l guided in a bracket 332 at its upper end and in a bracket 333 at its lower end (Fig. 8). Bracket 333 is mounted on the keyboard base casting 334. Pivoted on the bracket 333 at 335 is the keyboard locking bell crank 338, which is provided with a horizontal arm 33'! that cooperates with the lower end of the follower 33l. The depending arm of the bell crank 336 is engageable with a universal bar 338 pivoted on a shaft 339. A spring 3 extending between the pivot shaft 339 and the depending arm of the bell crank 336 normally holds the bell crank 336 in a rightward or counterclockwise position, and simultaneously acts to hold the arm 33! against the follower 33l, which, in turn is held against the cam surface or notch 323 of the cam 325. Positioned above the universal bar 338 are a series of key levers 342, which upon operation or depression will actuate the universal bar 338 in a counterclockwise direction, as viewed in Fig. 8, to actuate. in turn. allk: member I" to release a clutch mechanlsm,"in'a manner fully described in the afore-mentioned Reiber patents. The cam 325 is provided-on its periphery with a square. projection or lug 345 which'cooperates with the laterally directed extremity of arm 345 of a bell crank lever Ill-pivoted at 343 on the bottom side of the punch block 8|. Lever 341 is spring. biased in a counterclockwise direction by a spring 3". The lug 3 acts as a stop to normally limit the rotation of cam 325 to substantially one revolution so as not to prematurely unlock the keyboard. 7

The operation oi the mechanism disclosed in Figs. 8, 7, and 8 is as follows: Assume that the tape perforating operation is proceeding normally and the star wheel M8 is being rotated clockwise and the bar 332 is being urged to its leftward position against the yielding stop 301, and that further rotation of the star wheel 31H merely causes the teeth of the star wheel to impinge successively against the teeth of the rack bar 382. In this condition of operation the lug 345 will have attained and heldthe position indicated 353 and shown in dotted lines in Fig. '7. Lug 345 is held thereat during further rotation of star wheel I38 by reason or the friction clutch. The indicator dial 3l8 will assume the position shown in F18. 6, and the cam notch 323 of the cam 325 will receive the cam follower 33L thus permitting spring 3 to hold the universal bar latch out of engagement therewith as shown in Fig. 8. However, assuming now that it is desired'to back space the tape, the back space bar "2 will be operated repeatedly. By means of the back spacing mechanism shown in Fig. 2 the star wheel Hi3 will be rotated step by step in a counterclockwise direction (as viewed in Fig. 7), as will also the cam 325.. The parts disclosed are so designed and arranged that in response to the first angular step in a counterclockwise direction the notch 323 of the cam 325 will, through its contour, push the follower 33l downwardly so as to rotate the latch 336 against the action of its spring 34! to bring the shouldered extremity of the depending arm underneath the universal bar 338 to prevent its actuation, for a predetermined time, by the key levers 332. Thereafter for one revolution of the cam 32! the follower 33l will bear against the face of the cam 325. Moreover, after the bar 302 has been actuated'rightwardly the first step due to the interengagement of the teeth on the periphcry of the star wheel-I03 and-the teeth on the rack 302, the indicator dial 3|9 wlll be actuated counterclockwise to bring the legend thereon into register with the opening 32! to apprise the opversal bar 338 to permit the operation of said key, in which case there is provided ior said key a separate means for releasing the clutch normally controlled by the link 343. with this arrangement, the operator cannot operate any of ."the keys 342 except the reboot key and this latching up or locking of the universal bail 338 guards against false operation of said keys. The operator, of course, is further advised 0! the necessity of rubbing out or cancelling the periorated code by the position of the indicator dial 3". The lockout mechanism and indicator dial will be brought to normal after the last character has been rubbed out, in which case the notch 323 will have returned to the position shown in Fig. 6 so as to permit thecam'follower 3 to enter therein and release the latch 335 from looking engagement with the universal bail 338. The indicator dial will again have returned to the position shown in Fig. 8.

In Fig. 9 is shown an arrangement for preventing the operation of the back space mechanism when the platen carriage I8 is in its zero or beginning-of-line position, after, for example, a carriage return operation has been consummated. As also shown in Fig. 1 of the principal embodiment of the invention, the platen carriage is indicated in Fig. 9 as 18 and is engaged by the carriage return strap 14 which terminates in a carriage return spring housing 13. The housing 13 rotates about a pivot 35l and carries on the face thereof near the periphery a blocking member 352, which is effective when the carriage return housing is in the position shown in Fig. 9 (which is that position whereat the platen carriage i8 is in its beginning-of-line position). In this position the blocking member 352 acts to prevent the operation of the back space bar H2 for the operation of the platen back space mech-- anism. Accordingly, rotation of the back space lever I26 about its pivot I21 is prevented. Therefore, until the blocking member 352 is removed from the path of the bar 2 the back space mechanism for the platen l8 cannot be operated. Thus, alter the first character has been printed on the page and the platen l8 has been moved one character space (toward the left as viewed in Fig. 9) the blocking member 352 will have been moved with the rotating carriage return spring housing 13 one angular step, which in accordance with the present disclosure is sufficient to bring the blocking member 352 out of the path of the member H2 so that thereafter the member H2 may be readily operated by the back spacing mechanism, exemplified in Fig. 2, by the bar 2.

erator that the back spa'eedcharacters will have to be rubbed out before he cancontinue to oper-' ate the keyboard and thus operate the perforator in the normal manner. When backspacing, the star wheel I08 and cam 325 will'be actuated in a counterclockwise direction until the lug 335 on cam 325 has moved iromthe normal position indicated 35. to the position indicated 345. At this time the rack bar 302 will have been actuated rightwardly so that the end MS of the groove 3 will actuate the yieldable stop member 3l2 against the actionoi spring 3l8 thereby holding the teeth. of the rack into engagement with the star wheel teeth. When it is desired to advance the tape to rub out oncancel the back spaced perforations, the rubout'k'ey 23 (Fig. 1) of the series of keys 342 (Fig. 8) will beactuated repeatedly, a notch being provided in the unidition would arise, for example, when the code signal combination (that is, "figures shift or letters unshift) which was perforated in the tape did not require that a letter spacing or character spacing movement of the spacing mechanism be imparted to the .platen l8. Thus, when the platen shift (figures) or platen unshift (letters) code is perforated in the tape under the control of the selector mechanism 33, the mechanism of the printer I5 is such as described in the afore-mentioned Reiber patent, so as to suppress the printing and character spacing operations of the mechanism since the noted code combinations are function code combinations. In Figs. 11, 12, 13, and 14 there is shown one method of preventing the back spacing of the platen I8 when the code combination of the tape being back spaced is one that did not require the efiectuation of a platen spacing movement. Having reference to Fig. 11, the punch block is indicated as II, and is similar to the punch block I II shown in Fig. 2. In accordance with this embodiment of the invention, a sixth hole is perforated in the tape automatically whenever a "figures" shift or letters unshift code combination (or any other desired code combination) is to be perforated. Then, when the tape is back spaced, a sensing mechanism is provided which automatically senses the tape to determine when a shift or unshift combination is back spaced, in which case the back space mechanism of the platen I8 is prevented from being operated.

With the arrangement shown in Fig. 11, there is also provided a sixth interponent I52 which cooperates with the sixth punch I53. Interponent I52 is pivotally articulated to a sixth selector lever I54, similar to selector levers 82 shown in Fig. 2. However, lever I54 is provided with a depending bail portion I55. Unlike selector levers 82, the lever I54 is not provided with a projection 85 which coacts with the transfer bail 5I, nor is it provided with a shoulder 86 which cooperates with the T-ievers 36. Moreover, the lever I54 is not provided with a spring located such as spring 88 in Fig. 2, but is provided with a. spring I56 which normally biases the lever I54 in a counterclockwise direction about pivot 83. With this construction the lever I54 is caused to rotate counterclockwise only when the figures shift and the letters shift (or other designated) code signals are received.

The depending portion I55 is conformed with a U-shaped projection, as shown at I51 (Fig. 13), so that the lever I54 can be rotated counterclockwise in response to the figures shift signal, which causes the clockwise actuation of the No. 3 lever 82 and the counterclockwise actuation of the Nos. 1, 2, 4, and 5 levers 82. In response to the letters shift all the levers 82 are actuated to their counterclockwise position. Thus, upon the receipt of either a figures shift or a letters shift code combination the interponent I52 will be actuated rightwardly to bring its projection I58 into the path of the punch pin I53. The punch pin I53, instead of being slidably mounted in the punch block I5I isslidably carried in a bar I59, as shown in Fig. 14. The punch I53 is provided with an enlarged end I6I which cooperates with a member I62, secured to the punch hammer I63 which is pivoted at I64. With this arrangement, the actuation of the punch hammer I63 in a clockwise direction (as viewed in Fig. 11) with the interponent I52 positioned with its projection I58 in alignment with the punch I53 will cause the punch to perforate the tape I65 in the sixth hole position. Then, when th punch hammer I63 is rocked in a counter lockwise direction, the head I6I will be engag ,d by the member I62 to withdraw the punch I53 from the tape I65.

In this embodiment of the invention, the back spacing and forward spacing mechanisms are exemplified by the feed roll I66, and may take substantially the form as shown in Fig. 15. After the punching operation has been performed, the

' tape I65 will be advanced leftwardly, as shown the tape I61, as will presently appear, the bar I59 is operated in a. manner to permit the sensing pin I68 integral therewith to sense the tape for the pres-' once or absence of a sixth hole. If a sixth hole is found in the tape, the back spacing of the platen I8 will be prevented and if a sixth hole is not found in the tape, the back spacing of the platen I8 will be effected simultaneously with the back spacing of the tape. The back spacing bar I61 is slidably supported in the punch block I5I and in a bracket I69 (Fig. 12). A spring III encircles the bar I61 and is compressed between the bracket I69 and a fiange I12 integral to the bar I61, whereby the bar I61 is normally held in its leftward position as viewed in Fig. 12. Bar I61 is also provided with narrowed or restricted portion I13 which is spanned by the forked lower end of a lever I14 pivotally mounted at I15, the upper end of which is provided with a slotted hole to permit the bar I59 to extend therethrough. A spring I16 encircles thebar I59 and is compressed between the upper end of lever I14 (and collar I16) and a flange I11 integral with the bar I59.

The right-hand end of bar I59 (as viewed in Fig. 12) is pivotally articulated to the upper end of the vertical arm of a bell crank lever I18 pivotally mounted at I19. The extremity of the horizontal arm of bell crank I18 cooperates with the flange I12 of the bar I61. When the back spacebar I61 is depressed by applying pressure to the finger piece I'8I it imparts counterclockwise rotation to lever I14 (as viewed in Fig. 12) thus tending to urge, through spring I16, the bar I59 leftwardly to bring the sensing pin I68 into sensing relation with the tape I65. During this probing operation the back spacing of the tape will be delayed, since the back spacing mechanism is in principle similar to that shown in Fig. 15. If a perforation is found by the pin I68 in the sixth position of the tape I65, the sensing pin I68 will pass therethrough and permit the bar I 59 to move a predetermined amount leftwardly. In this event, the bar I59, through its pivotal articulation with lever I18, will cause the bell crank lever I18 to rotate counterclockwise about pivot I19 to bring the end of its horizontal arm into the path of the flange I12 on the back space bar I61. It is, of course, understood that the space between the flange I12 and the end of the horizontal arm of lever I18 is sufficient to permit the back spacing member I61 to be moved rightwardly a distance sufficient to effectuate the sensing operation between the sensing pin I68 and the tape I65. as well as to effect the back spacing operation. Moreover, the distance between the end of the bar I61 and the end of the bar I82 is-also sufficient to permit the efiectuation of these operations. That is, the space indicated I83 is sufficiently great to permit a preliminary testing movement of the bar I61 to determine whether a perforation in the sixth position has been found by the sensing pin I68, and to effect the back spacing operation. It is observed that the positioning of the horizontal arm of the lever I18 into the path of the flange I 12 will prevent further movement rightwardly of the bar I61 (as viewed in Fig. 12). Rightward movement being thus impeded, the bar I82, which is comparable to the bar I I2 of Fig. 2 will not be operated, and hence the back spacing mechanism of the platen I8 will not be operated.

However, if there is no perforation in register with the sensing pin I68 in the sixth position of the tape, the bar I59 will only be moved a limited ansaaao end of its horizontal arm into the path of the flange I12, thereby permitting further movement of the bar I81 so as to take up the space I83 and bring the bar I61 into contact with the bar I82. Thus, upon further rightward movement of the bar I81, the bar I82 will be actuated rightwardly to effect the operation of the backspacing mechanism for the platen I8, as previously shown and described.

Provision has been made for permitting the operation of the back spacing mechanism for the tape I85 while the sensing pin I88 is engaged in a sixth hole in the tape. To achieve this result, the die plate I84 for the sixth punch I 53 is a slidable member carried in the punch plate I85. The punch plate I85 is provided with holes I88 to cooperate with the normal code punches (comparable to punches 88 in Fig. 2); but, for the sixth punch I53 a slotted hole I8! is provided, so that the feeler pin I 68 in penetrating the tape can move the plate I84 to bring the hole therein into alignment with the code punch holes I88. In other words, when a hole is found in the sixth position of the tape by the pin I68, and a. back spacing operation is performed with the pin N8 in this position, the back spacing of the tape will not be opposed since the bar I59 is permitted to rotate a slight angular amount in a counterclockwise direction so that the pin I68 can move rightwardly (as viewed in Fig. 11) to the position in alignment with the punches I86 (since it is understood that the tape after the punching operation, previously described, is advanced one space in a tape advancing direction). A spring I88 is provided to hold the slidable die plate I84 in its leftward position, as viewed in Fig. 13.

Another modification of the present invention is shown in Figs. 15 to 19, inclusive, and contemplates the control of the platen back spacing mechanism under certain operating conditions to prevent the operation of the platen back spacing mechanism by means of a device for sensing the complete code combination instead of merely a hole in the sixth position in the tape. Having reference to Figs. 15 to 19, inclusive, the punch block is indicated as I9l, and is provided with a plurality of punches I92 operable between guide plates I93 and I84. A die plate I88 is spaced from the plate I94 to permit the tape I95 to pass therebetween. The punches I82 are provided with enlarged end which cooperates with the portion I96 of a punch hammer I81 pivoted at I88. A series of interponents I88 are operated in the manner described in the principal embodiment of the invention to bring the projection 28I thereon into or out of registration with the punches I82. g

Upon each oper tion of the perforating mechanism the pawl 28 pivoted at 283 at the extremity of the tape feed lever 284 is reciprocated to impart clockwise rotation to the tape feed ratchet 285, the pawl 282 being normally biased in a counterclockwise direction to keep the tooth thereon in engagement with the ratchet 285. The ratchet 285 is integral with a tape feed shaft 288 to which is also secured the tape feed roll 281. Clockwise rotation of the feed roll 28! will cause the tape I85 to be advanced leftwardly, as viewed in Fig. 15. Now, when the letters" unshift and 16 "flgures shift combinations are punched in the tape I 95, mechanism is provided in the printer apparatus II for suppressing the spacing movement of the platen I8 despite the fact that the tape I95 is spaced. Therefore, when it is desired to back space the tape I85, it is not necessary to eifect the back spacing of the platen I8 if the code combination being back spaced in the tape is a figures" shift or letters unshii't code combination (of course, other eombinations canbe employed).

To achieve this result, a sensing lever 288 is provided which is pivoted at 289 to a bracket secured to the punch block I8I. At the extremity of the arm 2I I of the lever 288, a series of sensing pins 2I2 are carried, which are guided between the plates I93 and I94 and which are spring loaded so as to cause them to press against the arm 2| I, so that when the arm 2 is caused to rotate slightly in a counterclockwise direction, the springs 2I4 will cause the sensing fingers 2I2 to press against the tape I if no perforations are sensed in the first, second, fourth and fifth code position, simultaneously (which is the "figures" code combination)..- Lever 288 is also provided with an arm 2I5 which carries thereon in spaced relation, a pair of adjustable studs 2I8 and 2". Cooperating with stud 2I8 is-a plate 2I8 carried on the back space'bar 2I8. Stud 2I'I cooperates with a bell crank lever 22I which is pivoted to the platen back space bar 222 at 223. Bell crank22 I is normally biased in a counterclockwise direction about its pivot 223 by a spring 224. The platen back space bar 222 is guided at its forward end by a shoulder screw 2I8 engaging a slot 228 in the bar 222,the slot 228 being of sufficient length to permit the screw2 I 8 to reciprocate therein without imparting movement to the bar 222, since, as will presentiyappear, the bar 222 is reciprocated under the control of lever MI and a spring 238. The stud 2I8 cooperates with a twolevel notch 22'! in plate 2I8 and normally rests upon the upper level 225 of the notch 221.

Now, when the backspace bar 2I8 is depressed by applying pressure to the finger portion 228 the plate 2I8 will be moved rearwardly, as viewed'in Fig. 15, to cause thestud 2I8 to fall from the upper level 225 to the lower level of notch 22'! due to the pressure applied by springs 2I 4 upon the arm 2 if the sensing pins 2I2 have found ing bar 2I8. Upon further movement of the bar.

2I8 rearwardly, the stud 2I8 will ride up upon the inclined surface 23I of plate 2I8 to cause the lever 288 to rotate clockwise to retract'the sensing pins l2 from the perforations in'the plate-I85 preparatory to effecting the actual back spacing operation of the tape. s s

At this time, when the lever288 has been rotatedclockwise, the pawl 232 eflecting the back spacing operation of the tape I95 will have traveled from the solid line position shown ln'Fig. 15

to the dotted line position 233. So, when the bar 2 I8 is fully depressed, the pawl 232 will act upon the back spacing ratchet 234, which, through the feed roll 28'! will effect the back spacing of the tape I95. It is noted that since the lever 22I has been, during the preceding operation, ro-

tated out of operative relation with the shoulder 229, the bar 222 which is connected to the back spacing mechanism of the. platen I8 has not been operated. It is, of course; understood that clearances and motions between the various .elements are contemplated, such that the probing and sensing operations and the conditioning operations pursuant thereto are consummated before the back spacing operation is initiated; Upon the release of the back space bar 2I9 it is returned to its forward position by a spring 236.

When the sensing pins 2I2 do not sense a figures shift or letters" unshift, the lever 208 will remain substantially in its clockwise position as shown in Fig. with the pins 2 I 2 bearing against the tape I95 so that when the back space bar 2 I9 is depressed, the shoulder 229 thereof is free to engage the shoulder 228 of bell crank lever 22I to impart rearward motion'to the platen back space bar 222. \The back spacing of the tape is performed through the instrumentality of the pawl 232 and the back spacing ratchet 234, It is necessary to prepare for this operation by disengag ing pawl 202 from the ratchet 205, and to achieve by the operation of the interponents 258 under the control of the selector mechanism, bringing the projections 259 permutably in alignment with the punches 254 so that when the punch hammer 258 is operated, the tape 286 is perforated correspondingly. When it is desired to back space the tape 266, the back space lever 212 is depressed or operated by applying pressure to the finger piece 281.

During the initial portion of the rearward movement of the back space bar 212, the memthis result an arm 231 is provided on the pawl lever 232 which cooperates on the cam arm 238 on the pawl 202 so that as the pawl 232 is operated rearwardly by the lever 2I9 (to which it is pivotally connected at 239 on the extension 24I), the arm 231 will urge the pawl arm 202 in a clockwise direction against the action of its spring 242 to withdraw the pawl tooth from the ratchet 255. The arm 2 II of bell crank lever 208 is provided with an opening 243 (Fig. 17) sufficiently large to permit the punches I92 to extend therethrough, and has a pair of lugs 244 each of which spans the shoulders of a pair of feeler pins 2I2 to control the movement of the pins 2I2.

A further modification of the back spacing feature of the present invention is shown in Figs. 20 to 23, inclusive. Having reference to Fig. 20 the punch block is indicated as 25I in which are slidably carried between guide plates 252 and 253 a series of punches 254. The punches 254 are provided with enlarged ends which cooperate with the member 255 of the punch hammer 256 which is pivoted at 251.. A series of interponents 258 are provided which are controlled by the sensing mechanism, as disclosed in the principal embodiment, to bring the projection 259 into or out of the path of the punches 254 ,to effect their operation. Mounted on the punch block 25I is a lever, indicated generally as 26I, which is pivoted at 262. The horizontal arm 263 of lever 26I carries at its extremity a series of sensing pins 264 which cooperate with a series of holes adjacent to the punch holes in the die plate 265. Bell crank lever 26I is also provided with an arm 266 which is pivotally articulated at its free end to one end of a link 261. The other end of link 261 is provided with a slot 268 which cooperates with a stud 269 on a latch arm 21I carried on the back space bar 212. A spring 213 extends between the stud 269 and the end of lever arm 266. Back spacing bar 212 is provided with an extension 214 on which are mounted members 215 and 216 which control the operations of the bell crank lever 28I as will presently appear. Lever 266 is provided with an arm 280 which cooperates with the member 216. A spring 211 is attached to the extremity of arm 280 so as to urge the lever 26I normally in a counterclockwise direction. The arm 266 is provided with a cam projection 219 which cooperates with the member 215. Back space bar 212 is also provided with a rearwardly extending portion 28I which provided with a slot 282 through which extends her 216 will be moved away from the arm 280, permitting the spring 211 to rotate the lever 26I in a counterclockwise direction to bring the sensing pins 264 into contact with the tape 286. As previously described, there are four sensing pins 264 arranged in the first, second, fourth, and fifth code positions corresponding to the "figures or shift code signal. If the sensing pins 264 are blocked in one or more of the code positions, the lever 26I will not be rotated counterclockwise sufiiciently to actuate the link 261 to rotate the latch 21I out of the path of shoulder 288 of bar 285. Thus, upon further movement of the bar 212 rearwardly, the pawl 289 will engage the ratchet 29I to rotate the feed roll counterclockwise one angular step to effect the back spacing of the tape.

If perforations are in alignment with the sensing pins 264 in all of the first, second, fourth, and fifth code positions, the lever 26I will be rotated sufiiciently by the link 261 to cause the link 261 to disengage the latch 21I from the shoulder 288. It is noted in Fig. 20 that the pawl 289 is of suflicient length so that its toothed extremity will not engage a tooth of the back space ratchet wheel 29I until the sensing pins 264 have performed their function of sensing the tape (Fig. 23) and have returned to the position shown in Fig. 20 clear of thetape so that the tape is free to be back spaced. Thus, when the back space bar 212 has been actuated to the position shown in Fig. 23, the lever 26l is rotated into the position shown with the sensing pin 264 into the perforation of the tape, thus permitting the lever 26I to rotate sufficiently to actuate the link 261 to rotate the pawl 21I out of the path of the member 285. When the back space bar 212 is further depressed, the member 215 coacts with the projection 219 to rotate the lever 26I in a clockwise direction to withdraw the sensing pin 264 from the perforation in the tape thus stretching the spring 213 and returning the link 261 rightwardly to the dotted line position shown in Fig. 23. The arm 2" will not return to its clockwise position but will be held in its position shown in Fig. 23 so that when the back space bar 212 is depressed the full amount, the pawl 289 will engage the back space ratchet 29I and back space the tape, and the bar 285 will not have been operated so that the platen is not back spaced during this operation. The spring 293 lever 362 which is pivoted at 363.

et in the-manner shown in the embodiment iilustrated in Fig. 15.

In Figs. 24 and 25 there is shown a modified arrangement for locking up the keyboard against operation under certain conditions of operation. For example, when the apparatus has been operated in the "figures" shift or upper case position and it is desired to back space certain of the characters for cancellation, the mechanism according to Figs. 24 and 25 is provided to remind the operator to return the type wheel to the "flgures shift position after the rubout or cancellation operation has been performed, because during the cancellation or rubout operation the type wheel has been automatically shifted to the "letters" or lower case position, since the "letters" unshift and rubout code combinations are identical: that is, they are both an ail-marking code combination. More specifically, when the rubout key is operated with the type wheel in -the upper case position, the type wheel will be returned to the lower case position, and mechanism will be operated to lock the universal ball of the keyboard against operation, thereby locking the keyboard. In this condition of operation only the rubout key can be actuated following the back spacing operation, and if the type wheel was in the upper case position before the back spacing operation took place. the operator is reminded to return the type wheel again to the upper case position because of the fact that the keyboard 3 locked against operation and the operator is thereby unable to continue operating the apparatus in the normal manner until the type wheel is so returned. In this manner, erroneous operation is prevented.

In Fig. 24 the punch block is indicated as 353 and the back spacing bar is indicated as 354, these elements being substantially identical to the corresponding members shown in the illustrations previously described. Mounted on the back spacing bar 354 is a stud 355 which cooperates with the vertical arm of a bell crank lever 356 pivoted at 355. To the extremity of the horizontal arm of the bell crank lever 356 is pivotally connected the upper end of a link 351. Pivotally mounted at the lower end of the link 351 at 358 is a lever 358. Adapted to cooperate with the right-hand end of lever 355 (as viewed in Fig. 24) is the vertical arm 35! of a bell crank Lever 362 is normally biased in a counterclockwise direction (as viewed in Fig. 25) against a suitable stop by a spring 364.

The horizontal arm of hell crank lever 362 operates upon a bracket 365 secured to the type wheel shift frame 356. The type wheel 361 is slidably mounted on the type wheel shaft 365 for reciprocation between the full line position ilsigwn in Fig. 25 and the dotted line position When the type wheel shift member 365 has been elevated to the figures or upper case position indicated 355, the bell crank lever 362 will be rotated to the dotted line position indicated at 31!, in which position the vertical arm of lever 362 will act to block counterclockwise rotation of lever 355. Referring to Fig. 24, the left-hand end of lever 359 cooperates with the free end of a latch lever 312 which is pivoted at 313 on a bracket 314. Lever 312 is normally biased clockwise by a spring 315. Lever 312 is provided with a shoulder which cooperates with the upper end of a locking lever 315 pivotally mounted on a counterclockwise by a spring 313. The lower end of lever 316 is provided with a lateral projection which locks the universal bail 316 against rotation about its pivot 33! when the locking lever 315 is permitted to assume its counterclockwise position, as will presently appear. Articulated to the universal bail 313 is a link 362 which functions to release the clutch (not shown) for governing the rotation of the transmitter shaft.

Also mounted on the pivot shaft 311 is a bell crank lever 333 which is normally biased in a counterclockwise direction about the pivot 311 by a springv 354 to bring the laterally directed portion 355 (Fig. 25) of its horizontal arm into contact with the lower edge oi a key lever 356. The link 351 is normally urged downwardly by a spring 331 secured to a stud carried thereon (Fig. 25).

Operation of the'mechanism shown in Figs. 24 and 25 is as follows: Assume that the tape is being perforated and a record is being made upon the page, with the type wheel 551 in the upper case position, indicated by the dotted line 365 in Fig. 25, and that it becomes necessary to correct a portion of the record thus made. Accordingly, the back spacing bar 354 will be operated successively the required number of times to back space the tape an amount corresponding to the material to be deleted. Upon the first operation of the back space bar 354 rightwardly, as shown in Fig. 24, the stud 355 thereon will operate bell crank lever 355 clockwise to raise the link 351. Since the type wheel shift member 366 is in the upper case position, the lever 352 is positioned with its arm in the position shown in dotted lines 31l, with the lower extremity thereof in the path of the right-hand end of lever 359.

Thus, when link 351 is raised, lever 353 will rotate about the lower end of lever 36l in a clockwise direction, causing the left end of the lever 355 to pivot the arm 312 in a counterclockwise direction against the action of the spring 315. This movement of lever 312 will permit the upper end of the lock lever 316 to be freed to respond to the pull of its spring 316, whereby the latching lever 315 will be rotated counterclockwise to bring the lower end thereof below the universal bail blade 335. In this condition, the key levers are locked against operation due to their inability to rotate the universal bar 313 counterclockwise. The locking of the beyboard in this manner hasbeen rendered possible by the fact that the type wheel shift member 366 is in the upper case position, thus holding the lever 362 in its clockwise position (shown dotted in Fig. 25) against the action of spring 364 to bring the depending arm 36f into the path of the lever 356.

When the deleting or rubbing out operation is begun, the first rubout signal will act in the manner of a letters" or unshift signal in addition to its effect of rubbing out or cancelling the code perforation in a tape with an all-marking signal. In response to this rubout signal the shift member 355 will be returned to its lower position, shown in full line in Figs. 24 and 25, thus permitting the spring 354 to return or rotate the lever 362 to its counterclockwise position. as

After the cancellation operation has been com- I pleted and the operator wishes to continue to prepare the record or to write the corrected matter he will attempt to operate the keyboard in the pivot shaft 311. Lever 315 is normally biased 35 usual manner but will and that he is prevented from doing so because the universal bar 319 has been locked up. This warns the operator that he must return the type wheel to its "figures shift or upper case position, shown in dotted lines in Fig. 25. Before he can do this he must unlock the keyboard and to accomplish this result a special key (not shown) is provided which is notched above the universal bar or which is positioned outside of the range of operation of the universal bar. This special key lever acts to rotate the pivot shaft 311, to which is also fixed the bell crank lever 383, in a clockwise direction against the action of its spring 384. This rotation of lever 383 acts through its laterally directed extremity 390 to unlatch the locking lever 318, thus rotating the lever 318 clockwise against the action of its spring 318 to bring the upper end thereof again into engagement with the shoulder on the arm 312. Lever 316 is thus held in its clockwise position as shown in Fig. 24, and the universal bail 319 is free to be operated thereafter by the keys 388. However, connected to said special key is a release mechanism (comparable to link 382) for releasing the transmitting clutch, so that upon operation of said special key, the figures or shift code signal will be transmitted, the eifect of which upon the printer unit will be to shift the member 368 again to the dotted line position, shown in Fig. 25.

In Figs. 26 and 27 there is shown an arrangement for marking the tape while performing the back spacing operation, to indicate to the operator, while he is performing the cancellation or deleting operation, when all of the back spaced code combinations are deleted or rubbed out. Mounted on the back space bar 39I is a bracket 392 to which is pivoted at 393, a lever 394 which normally tends to rotate counterclockwise about the pivot 393 due to a torsion spring 390 associated therewith. The left end of the lever 394 slopes upwardly toward the left and cooperates with a stud 395 carried on a bracket 398 secured to the punch block 391. The right end of the lever 394 is provided with a latch portion which cooperates with the lower end of the resilient portion of a depending lever 398 pivoted at 399 to a bracket 40l secured to the punch block 391. Lever 398 is normally biased in a counterclockwise direction about the pivot 399 by a spring 402, which rotation is limited by a stop 403. The lever 398 is also provided with a laterally and inwardly directed arm 404 which carries at its extremity a printing pad 405, for the inking of which suitable provisions may be made. The die plate 406 of the punch block 391 is provided with a special aperture 401 through which the printing pad 405 is operative, and through which the operator may view the markings made by the printing pad 405 upon the tape.

In operation, the mechanism for marking the tape is normally in the position shown in Figs. 26 and 27, so that when the back spacing operation is to be performed the back space bar 39l is depressed (operated leftwardly, as viewed in Fig. 27), and through the mechanism indicated in Figs. 26 and 27 as 408, the tape back spacing mechanism is operated in the manner described in connection with Fig. 2. The latch lever 394, also actuated with the back space bar 381, operates, through the latch end, upon the lever. 398 to rotate said lever clockwise about the pivot 388 to press the printing pad 405 against the tape. After a predetermined amount of movement of the member 39l, the latch lever 394 engages the stud 395, and due to the camming action therebetween, the lever 384 is rotated clockwise to release the latching end from the resilient depending arm of lever 398 to permit the spring 402 to return the lever 388 counterclockwise against the stop 403. As the back space bar 384 is then fully depressed, the tape is back spaced through the instrumentality of the mechanism indicated as 408, and the mark just made on the tape appears through the opening 401. Thereafter, when the cancellation or deleting operation is performed the marks appearing through said opening 401 will apprise the operator of the number of combinations to be deleted. In Figs. 28 and 29 is illustrated an alternative method for indicating to the operator when the back spaced code combinations have been rubbed out or deleted. In this arrangement, an electric lamp is provided in the punch block, and the light from the lamp will project through the perforations in the tape, where it will engage the attention of the operator and apprise him that there are more back space code combinations to be deleted. In Figs. 28 and 29 the punch block is indicated as 4 and the punches as 4| 2. The die plate 3 is provided with an opening or aperture 4 substantially the width of the tape and embracing one transverse row of perforations. This aperture 4 opens into a recess 5 in the punch block 4| I. Covering the front of this recess 5 is a plate 4"; on which is mounted a support 4" for an electric lamp 4. The lamp M8 is, of course, illuminated continuously and the light therefrom is emitted through the opening 4 only when there are perforations in the tape that have not been deleted; at all times thereafter the opening 4 will be obstructed by blank tape.

A slide 39! (Figs. 1, 2, and 3) is provided for disabling the normal tape feed pawl I02 by disengaging it from the ratchet I04 and holding it disengaged, when it is desired to thread a new strip of tape into the punch block or to quickly withdraw a section of tape. Slide 39l is suitably guided slidably with respect to the punch block 8| and the tape feed mechanism, and is provided with a vertical portion 392 which cooperates with extension 393 onthe pawl I02. Slide 39| is also provided with a finger portion 394 and an indicator pointer 395 integral therewith. Pointer 385 cooperates with a suitable legendary member (not shown) to visually apprise the operator of the operating condition of the perforator.

Although specific embodiments of the features of invention have been disclosed and described herein, it will be understood that the invention is not limited to such specific embodiments, but is capable of modification, reorganization, rearrangement and substitution of parts and elements without departing from the spirit of the invention and within the scope of the appended claims.

What is claimed is:

1. In an initiating recorder, transmitting means, a signal responsive selector, a printing mechanism and a perforating mechanism controller by said selector to record characters corresponding to generated signals in one web and to perforate equivalent signals in another web, and a common means operable to back space both webs substantially simultaneously preparatory to rubbing out a printed and a perforated character.

2. In an initiating recorder, transmitting means, printing instrumentalities comprising platen means and typing means movable rela- 'means and the record of said code marking mechanism and said strip moving means, means for causing a reverse response in said escapement mechanism and said strip moving means. and means controlled by said last recited means for preventing operation of said transmitting means. 4

4. In an initiating recorder, transmitting means at the recorder to actuate two recording means, printing instrumentalities comprising platen means and typing means movable relative to each other to iorm character spaces, code marking means, means for causing a predetermined similar response in said platen means and said code marking means, means for causing simultaneous reverse response in said platen means and in the record feed means in said code marking means, and means controlled by said last recited means for preventing operation 0 said transmitting means.

5. In an initiating recorder, keyboard mechanism for controlling the operation of said apparatus, printing instrumentalities in said apparatus comprising platen means and typing means, case shift mechanism for eflecting relative case shifting movement between said platen means and said typing means, escapement mechanism for effecting relative character-spacing movement between said platen means and said typing means, perforating means, strip moving means in said perforating means, a common back spacing means for reversing the operation or said escapement mechanism and said strip moving means, and means operative in response to the operation of the common back spacing means to lock said keyboard mechanism against operation, said locking mean rendered efiective by a predetermined operation oi the case shift mechanism.

6. In an initiating recorder, key operated means in said recorder for controlling the operation of said recorder, printing instrumentalities comprising platen means and typing means, pawl and ratchet mechanism for eifecting relative movement between said platen means and said typing means, means for effecting relative case shifting movement between said platen means and said ,typing means, perforating means, strip moving means in said perforating means, signal controlled means responsive to the eil'ectiveness 01' said key operated means for causing a predetermined similar response in said mechanism and said strip moving means, escapement mechanism for reversing the movement between said platen means and said typing means, back spacing mechanism for said strip moving means,

common means eflective to control the operations or said escapement mechanism and said back means controlled by said case shifting means, and means controlled by said conditioning means to lock said key operated means against operation.

'7. In an initiating recorder, printing instrumentalities-comprising platen means and typing means, character-spacing means for eflecting relative movement between said platen means and said typing means, code marking means, strip moving means in said code marking means, signal controlled means by an initiating transmitter in said recorder for causing a predetermined similar response in said character-spac-' ing means and said strip moving means, carriage return means for a certain one of said instrumentalities, escapement mechanism for reversing the movement between said platen means and said typing means, back spacing mechanism for said strip moving means, means dually effective to control theoperations of said escapement mechanism and said back spacing mechanism simultaneously, and means carried by said carriage return means and cooperative with said dually efl'ective means for preventing the operation of the last recited means.

8. In an initiating recorder, transmitting means at said recorder, printing instrumentalities comprising platen means and typing means movable relative to each other to form character spaces, code marking means, means for causing a predetermined similar response in said platen means and said signal determining means, means for causing simultaneous reverse response in said platen means and said code marking means, a cam controlled by said last recited means, and means controlled by said cam for preventing operation of said transmitting means.

9. In an initiating recorder, transmitting means in said recorder, printing instrumentalities comprising platen means and typing means movable relative to each other to form character spaces, code marking means, means for causing a predetermined similar response in said platen means and said code-marking means, common means for causing simultaneous reverse response in said platen means and said code marking means, a cam controlled by said last recited means, means controlled by said cam for preventing operation of said transmitting means, and means for indicating the condition of operation of said cam controlled means.

10. In an initiating recorder, key operated means for controlling the operation or said recorder, recording instrumentalities in said recordercomprising platen means and typing means, means for effecting relative ease shifting movement between said platen means and said typing means, spacing mechanism for eflecting relative character-spacing movement between said platen means and said typing means, code marking means, strip moving means in said code marking means, a common back spacing means for reversing the operation of said spacing mechanism and said strip moving means, conditioning means controlled by said case shifting means, and means controlled by said conditioning means to lock said key operated means against operation.

11. In an initiating recorder, key operated means for controlling the operation of said recorder, recording instrumentalities in said recorder comprising platen means and typing means, means for effecting relative ease shifting movement between said platen mean and said typing means, spacing mechanism for eilecting spacing mechanism simultaneously, conditioning 16 relativecharacter-spacing movement between 25 said platen means and said typing means, code marking means, strip moving means in said code marking means, a common back spacing means for reversing the operation of said spacing mechanism and said strip moving means, blocking means controlled by said case shifting means, and means controlled by said blocking means to lock said key operated means against operation.

12. In an initiating recorder, transmitting means, a signal responsive selector, a printing mechanism and a perforating mechanism controlled by said selector to record characters corresponding to generated signals in one web and to perforate equivalent signals in anothenweb, a common means operable to back space both webs substantially simultaneously preparatory to rubbing out a printed and perforated character,

and means controlled by said back spacing device for preventing operation of said transmitting means.

EMILY Y. REIBER,

Emecutria: under the Last Will and Testament of Albert H, Reiber, Deceased.

REFERENCES crrnn The following references are of record in the file of this patent: 

